I'm pretty sure it's possible to get a SCP Foundation Lego set made via the Lego idea website. Me and agent-macleod have been discussing ideas via PM, but I wanted to get suggestions from the general public.
If you could make a Lego scip set, what would it be? What would it have in it?

I would go for a detailed, single piece, that I could display. Not something I would play with or even let my kids touch, but something my friends would see and say "Hey! that looks cool! what is it? […] SCP foundation? well that sounds interesting."

I've seen sets based on more established properties not get enough votes to succeed (notably the Mark V Ogre cybertank model; if a quarter of the people who paid a hundred and something dollars for the designer edition of the game had voted (for free) for the LEGO set it would have been made).

A few big sets based on every big SCP and a few big sets based on Foundation sites, for sure. SCP-1917, complete with a bunch of tank parts you can add to it or use to make 1917's artworks would definitely be a cool thing. A Foundation Site set (along with a few figurines to represent established skips) would not be a Bad Thing, nor would an SCP-2722 set. Definitely a small "MTF" set complete with tacticool minifigures and an attack helicopter or summat.